how to check an amp
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=27553
Printed Date: July 19, 2025 at 8:21 AM
Topic: how to check an amp
Posted By: jboat71
Subject: how to check an amp
Date Posted: March 02, 2004 at 12:18 AM
i recently installed a clarion 835 & lighting 150x2 in my 92 caprice. ran sub output to amp there is no sound coming from sub. +, -, & ignition are fine [checked with a multimeter]. brought speaker inside it worked on my home sys. what should i check next? thank you for any help ------------- jboat71
Replies:
Posted By: wvsquirrel
Date Posted: March 02, 2004 at 1:16 AM
check your gains on the amp, and your connection from the headunit to the amp. ------------- Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com
Posted By: jboat71
Date Posted: March 02, 2004 at 8:58 AM
can you check them with a voltmeter? they are connected to the hu ------------- jboat71
Posted By: forbidden
Date Posted: March 02, 2004 at 11:48 AM
The lightning audio amp should have 2 led's oon it, one green led for power on and a red led for protection, which one is lit up?
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Top Secret, I can tell you but then my wife will kill me.
Posted By: jboat71
Date Posted: March 03, 2004 at 10:42 PM
the red one is lit up is that one protection
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jboat71
Posted By: wvsquirrel
Date Posted: March 03, 2004 at 10:53 PM
If the red protection light is lit, then yes that's the problem. Refer to your manual fo rwhat to do. I'll try and do some research online to see what I can find too. What's the model of the Lightening Audio amp? ------------- Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com
Posted By: Ravendarat
Date Posted: March 03, 2004 at 10:54 PM
yep, your amp is in protection. Try unhooking all the speaker wires and then turn the vehicle back on and see if it lights up green or red. If its green than check the sub and see if its unhooked inside the box and the wires are touching each other or the basket. If they arent then check the back of the box and make sure the wires arent touching. If the amp lights up red than you probally have a problem with the amp and need to get it fixed/returned/exchanged or whatever. Before you pull it out though, if it lights up red you can disconnect the remote line and take a wire and jump from the remote to the constant 12 and see if it lights up green. If it does than you have a problem with the remote line. I have seen remote lines that are pinched or had a screw put through them turn an amp on and send it into protection before. I hope this help some
Posted By: jboat71
Date Posted: March 04, 2004 at 12:24 AM
the model is b150.2 i will try the remote line
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jboat71
Posted By: jboat71
Date Posted: March 04, 2004 at 11:33 AM
i bypassed the ignition wire with the speakers disconnected the light is still red
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jboat71
Posted By: sam1
Date Posted: March 04, 2004 at 12:15 PM
sounds like a bad amp to me if the speakers are disconnected and you bypassed the remote wire and it is still in protection.
Posted By: DYohn
Date Posted: March 04, 2004 at 12:58 PM
Did you buy it new? Take it back. If you bought it used, it may be repairable. You'll have to find a service center in your area who can look at it.
Posted By: forbidden
Date Posted: March 04, 2004 at 1:17 PM
Disconnect all speaker wires and the rca cable, if the red protection led is on, the amp is faulty. If the protection led goes on with the rca plugged in, check the rca cable to see if it is grounding out.
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Top Secret, I can tell you but then my wife will kill me.
Posted By: walty220
Date Posted: March 04, 2004 at 3:10 PM
check your ground,make sure it is connected securely to a chassis bolt
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1983 Oldsmobile Hurst/Olds
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Pioneer Premier DEH-P360
KICKER K35 & K410 Speakers
KICKER KX150.4 Amplifier
Rockford Fosgate PUNCH 1200W Amplifier
Rockford Fosgate PUNCH 800W 12" HE2
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